Grease cup



Patented Feb. 6, 1923.

RICHARD L. BARRETT,

or CHICAGO, ILLINOIS.

GREASE CUP.

Application led January 12, 1920. Serial No. 351,015.

To @ZZ whom t may conce/rn lie `it known that l, RICHARD L. BARRETT,

a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Grease Cups, of which the following is a specification.

Heretofore considerable difficulty has been experienced with grease cups of this character, and particularly where they have been located in some inconvenient or not readily accessible position, in that when the cap has been removed to lill the cup with grease, it is difficult to properly position the cap back l5 upon the cup so that the screw threads will register, and when the cap is forced upon the cup, the threads stripped.

Furthermore it frequently happens that the cap will work its way off of the cup and become lost.

To overcome these diiiiculties and objections and to provide an improved device of this character embodying a cap having a plunger therein provided with screw threads adapted to engage the threads of the cup, and having means whereby the plunger will be properly positioned and guided when the cap is applied, so that the threads will reg ister and engage, is one of the objects of the present invention.

A further object is to provide improved means for detachably securing the cap in position.

To the attainment of these ends and the accomplishment of other-,new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating this invention, and in which:

1Figure 1 is a side elevation.

Figure 2 is aside elevation with the parts in a dierent position from that shown in. Figure 1.

Figure 3 is a vertical longitudinal sectional view with parts in elevation.

Figure 4 is a view similar to Figure 3 with the parts in a different position.

Referring more particularly to the drawing, the numeral 10 designates a grease cup of any desired size and externa-l configuration, having a threaded stem or portion -11 will be mutilated orV by means of which the cup may be secured to a suitable part 12 by meansof an angular portion 13 on the stem and which angular portion is adapted to receive a wrench or tool, all as usual in grease cups of this character.

The cup is provided with internal screw threads 14 and is also provided with an outlet opening 15 through which the grease is forced from the cup.

A cap 16 isA also provided, the internal diameter or" a portion of which is slightly greaterl than the external diameter of the cup 10 so that the cup 10 may be passed into the cap 16. This cap 16 is provided with an end 17 which is closed except for an opening' 18 located centrally thereof and surrounding the opening is a collar 19 forming an extended guide for a plunger 20 and which is adapted to pass therethrough. One end of the plunger 20 is enlarged as at 21 and this enlarged por-tion is of a diameter slightly less than the interior diameter of the cup 10. The enlarged portion 21 is provided with peripheral screw threads 22 which are adapted to engage' the threads 14 on the interior of the cup 10 so that when the plunger 2O is rotated by means of a suitable handle 23, the' threads 22 on the portion 21 of the plunger will engage the threads 14 of the cup and will cause the plunger to be advanced or retracted according .tol the direction of rotation of the plunger. The cap 16 extends for any desired distance above the top of the cup 10 and has provided therein a recess 24 into which the enlarged por tion 21 of the plunger is adapted toenter so that the threads on the portion 21 may be entirely disengaged from the threads 14 in the cup to permit the cap 16 and plunger 2O to be removed as a unit from the cupA when desired.

The cap l16 may be detachably secured to the cup in any suitable manner, but preferably by means of a bayonet slot construction embodying one or more bayonet slots 25 arranged preferably in the lower edge of the cap, and one or more pins 26 carried by the outer wall of the cup 10 so that when the cap is placed in position the pins 26 will enter the bayonet slots 25 and after the cap 1s rotated with respect to the cup, the parts will be locked together. If desired a suitable spring 27 may be provided which extends 4.31791 @be bayonet Slots and is provided with recesses 28 to receive the pins 26 and assist in securing the parts against accidental displacement.

If desired the walls of the slots 25 may be inclined so that the p'i'ns 26 will be wedged therein.

lt is thought that the operation o'f this improved device will be readily understood from the foregoing, but briefly stated it is as follows. The threads 22 on the enlarged portion 21 of the plunger 20 are first detached from the threads 14 of the cup which will cause the enlarged portion 21 of the plunger to be seated in the recesses 24C of the cap. rlhe cap is then rotated with respect to the cup to position the pins 26 in alinement with the inlet openings of the bayonet slots.v The cap may then be lifted from the cup.

With this improved construction it will be manifest that the threads on the co-operating parts will be vpreserved and when the parts are locked together it will be impossi-` ble for them to become accidentally separated or detached.

If desired and in order to assist in securing the parts together the cap 16 may be pro-v l vided with a knurled or serrated portion 29.

Obviously the plunger 20 and the handle 23 thereon can be constructed in any suitablel manner so as to permit the parts to be readily assembled.

1While the preferred form of the invention has been herein shown and described, it isV to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims without departing from the spirit of this invention.

The cap can then be re-applied by i first positioning the bayonet slots to receiveY lVhat is claimed as new is 1. A grease cup embodying a cup proper having internal screw threads and provided with a smooth exterior surface7 a cap for the cup, a skirt connected with the cap and adapted to be freely slipped over the cup and to engage the periphery of the cup, a p lunger operable in the cup and having peripheral threads adapted to engage the threads within the cup, there being an opening in the cap, a bearing encompassing the opening, said plunger being freely slidable in the bearing, and means whereby the plunger may be rotated with respect to the cap the said skirt serving to insure an initial positioning of the plunger exterior of the cup proper that the threads on the plunger will be properly positioned to engage the threads in the cup.

2. grease cup embodying a cup proper v having internal screw threads and provided with a smooth exterior surface, a cap for the cup7 a skirt connected with the cap and adapted to be freely slipped over the cup and to engage the periphery of the cup, a plunger operable in the cup and having peripheral threads adapted to engage the threads within the cup, there being an opening in the cap, a bearing encompassing the opening7 said plunger being freely slidable in the bearing, means whereby the plunger may be rotated with respect to the cap, the said skirtservn ing to insure an initial positioning of the plunger exterior of the cup proper that the 'threads on the plunger will be properly positioned to engage the threads in the cup7 and means detachably securing the cap to the cup.

3. A grease cup embodying a cup proper, a cap therefor and into which cap the cup telescopes means detachably securing the cap and cup together a plunger operable in the cup. there being an opening in the cap through which a portion of the plunger extends7 and a handle secured to the plunger for operating the same from the outside of the cap7 said handle embodying a piece of sheet material bent upon itself to form spaced arms, and between which arms the end of the plunger is secured.

In testimony whereof I have signed my name to this specification, on this 30th' day of December, A. D. 1919.

RICHARD L. BARRETT. 

